DOC: how to upload to github

doc/README.md

@@ -0,0 +1,41 @@
+Build pages
+-----------
+
+We assume that your epac repository is located in "~/pylearn-epac". Goto the directory which contains the doc source, and then build the doc.
+
+```
+$ EPACDIR=~/pylearn-epac
+$ cd $EPACDIR/doc/source
+$ make html
+$ mkdir -p ./_build/html/epydoc_api
+$ epydoc -v --html epac -o ./_build/html/epydoc_api
+```
+
+The website has been built in "~/pylearn-epac/doc/source/_build/html". You can open "index.html" by firefox to test.
+
+```
+$ firefox  $EPACDIR/doc/source/_build/html/index.html
+```
+
+Upload to github
+----------------
+"$EPACDIR/doc/source/_build/html" contains the epac website. Now we start to upload to github server. Clone epac from github to a temporary directory, and checkout gh-pages branch
+
+```
+$ cd /tmp
+$ git clone git@github.com:neurospin/pylearn-epac.git epac_doc
+$ cd epac_doc
+$ git fetch origin
+$ git checkout -b gh-pages origin/gh-pages
+```
+
+Copy the built website and push to the gh-pages branch on github.
+
+```
+$ cp -r $EPACDIR/doc/source/_build/html/* ./
+$ git add .
+$ git commit -a -m "DOC: update pages"
+$ git push origin gh-pages
+```
+
+Now, you can visit your updated website at http://neurospin.github.io/pylearn-epac.